AI Damage2020 Buick Regal: common problems
Owners of the 2020 Buick Regal filed 2 complaints with NHTSA, most often about electrical system and tires. The maker issued 561 service bulletins for this year. We found 3 repair videos on YouTube. Details by component below, with sources.
Key figures
- Owner complaints
- 2
- Technical service bulletins (TSB)
- 561
- YouTube repair videos
- 3
What fails most often
- 1 Electrical system 50% of all complaints
- 2 Tires 50% of all complaints
- Electrical system: 1 complaints (50% of all); manufacturer bulletins for this component: 115.
- Tires: 1 complaints (50% of all); manufacturer bulletins for this component: 20.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2 L · petrol · turbo · 4 cyl
- 3.6 L · petrol · 6 cyl
- automatic, 8-speed
- automatic, 9-speed
Drive: AWD, FWD
Symptoms owners describe
How many of the 2 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 1 | 0 | 115 |
| Tires | 1 | 0 | 20 |
| Equipment | 0 | 0 | 195 |
| Engine and cooling | 0 | 0 | 88 |
| Engine | 0 | 0 | 59 |
| Powertrain | 0 | 0 | 57 |
| Wheels | 0 | 0 | 34 |
| Structure | 0 | 0 | 25 |
| Fuel system | 0 | 0 | 19 |
| Service brakes | 0 | 0 | 17 |
| Suspension | 0 | 0 | 12 |
| Visibility | 0 | 0 | 11 |
| Steering | 0 | 0 | 10 |
| Exterior lighting | 0 | 0 | 7 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Proximity door unlock system rarely works goes in and out even with key fob in pocket and within Proximity. I've reported the problem to buick/Chevrolet many times, changed fob batteries and etc with no fix
The contact stated while driving approximately 70 MPH, the TPMS warning light indicated that the rear driver’s side tire air pressure was low. The tire lost air pressure and became flat. Also, later the front passenger’s side tire developed bubbles and had to be replaced.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 1,862 of 2,102 model years in the NHTSA data (among the 11% least complained about).
On average one model year of the Regal has 17 complaints (5 years in the data). This year has 2, below average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Tires. Tire age by DOT code, bulges, wear pattern.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- PI to help diagnose A/C concern
- This preliminary information communicates information about how to determine if a wheel and tires size…
- This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a…
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic…
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered…
This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
- This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic…
- This service bulletin provides information on Tire Sidewall Irregularities
- This service bulletin provides information on replacing the intake manifold when the engine is replaced…
This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- This Preliminary Information communication provides information to the technician about vehicles that have…
This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions…
- The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle…
The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
NHTSA lists 561 bulletins for this year; the 12 newest are shown here.
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
- FULL BUILD: REBUILDING A SALVAGE CRASHED 2020 BUICK REGAL SPORTBACKamount per author: 4 UNSPECIFIED_DOLLAR
- FULL BUILD: REBUILDING A SALVAGE CRASHED 2020 BUICK REGAL SPORTBACK ESSENCEamount per author: 200 UNSPECIFIED_DOLLAR
- TIMELAPSE: REBUILDING A SALVAGE CRASHED 2020 BUICK REGAL SPORTBACK
Other years of this model
Questions and answers
What are the most common problems with the 2020 Buick Regal?
Owner complaints to NHTSA most often mention: electrical system, tires. Total complaints: 2. The most frequent symptoms in complaint texts: tires: bulges, blowouts (50%), warning lights, check engine (50%).
How many service bulletins (TSB) were issued for the 2020 Buick Regal?
NHTSA lists 561 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2020 Buick Regal from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2020 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.